Extensions 1→N→G→Q→1 with N=D4 and Q=C4

Direct product G=N×Q with N=D4 and Q=C4
dρLabelID
C4×D416C4xD432,25

Semidirect products G=N:Q with N=D4 and Q=C4
extensionφ:Q→Out NdρLabelID
D41C4 = D4⋊C4φ: C4/C2C2 ⊆ Out D416D4:1C432,9
D42C4 = C4≀C2φ: C4/C2C2 ⊆ Out D482D4:2C432,11

Non-split extensions G=N.Q with N=D4 and Q=C4
extensionφ:Q→Out NdρLabelID
D4.C4 = C8○D4φ: trivial image162D4.C432,38

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